Boreas A70 & A90

Using world-first Digital FOG (DFOG) technology, the Boreas A90 is an ultra-high performance IMU/AHRS with automatic gyrocompassing and a significantly lower SWaP-C (Size, Weight, Power and Cost).

Roll & Pitch
0.005 °
Heading (Gyrocompass)
0.01 ° seclat
Bias Instability
0.001 °/hr
Output Rate
1000 Hz

Using world-first Digital FOG (DFOG) technology, the Boreas A70 is a high-performance IMU/AHRS with automatic gyrocompassing and a significantly lower SWaP-C (Size, Weight, Power and Cost).

Roll & Pitch
0.01 °
Heading (Gyrocompass)
0.1 ° seclat
Bias Instability
0.01 °/hr
Output Rate
1000 Hz
Boreas | Fully Digital FOG

The Boreas A series combines cutting-edge Fibre Optic Gyroscope (FOG) technology with closed-loop accelerometers, which are coupled in a sophisticated fusion algorithm to deliver accurate and reliable orientation. The system features ultra-fast gyrocompassing, acquiring and maintaining an accurate heading under all conditions with no reliance on GNSS.

The Boreas A series can be upgraded to full INS capability through a software license upgrade. As an INS it can be interfaced to any of the leading brands of GNSS receivers to create an OEM GNSS/INS solution.



Revolutionary FOG IMU

Revolutionary DFOG Technology

Boreas takes Fibre Optic Gyroscope (FOG) technology into the next generation with new, patent-pending Digital FOG (DFOG) technology, developed over 25 years with 2 research institutions. This revolutionary DFOG technology combines a specially designed closed-loop optical coil with advanced spread spectrum digital modulation techniques that have never been used in a FOG before. The resulting DFOG offers dramatically improved accuracy, stability, and reliability with significantly reduced size, weight, power, and cost.
Fast North Seeking

Ultra-Fast North Seeking

The superior accuracy of the DFOG technology enables the Boreas range to rapidly determine heading without the need for GNSS or magnetometers. By sensing the Earth's rotation, Advanced Navigation's revolutionary north-seeking algorithm allows Boreas to acquire an accurate heading within minutes of start up. This can be achieved in both static and dynamic conditions, as well as at high latitudes.

Trusted Reliability


Boreas has been designed from the ground up for rugged reliability. Both the hardware and software are designed and tested to safety standards. The precision aluminium enclosure is waterproof and dustproof to the IP67 standard. The system is resilient to shock and vibration, allowing them to be used in the most extreme conditions. The hardware is designed and tested to MIL standards. The GNSS variants contains RAIM, which excludes malfunctioning or tampered satellite signals.

Industry Leading SWAP

Industry-Leading SWaP-C

Based on ground-breaking DFOG technology, the Boreas range offers industry-leading size, weight, power and cost, when compared to competing systems of similar performance.

Protocols Interfaces

Multi Protocol Support

The Boreas range features multiple interfaces including Ethernet, CAN, RS232, RS422 and GPIOs. It supports all the industry standard protocols including NMEA, CANopen, NTP, PTP, as well as a wide variety of proprietary protocols. A rich, responsive embedded web interface provides full access to all of the device's internal functions and data. Internal storage allows for up to 1 year of data logging.





Roll & Pitch Accuracy | A90
0.005 °
Roll & Pitch Accuracy | A70
0.01 °
Heading Accuracy (without GNSS) | A90
0.01 ° secant latitude
Heading Accuracy (without GNSS) | A70
0.1 ° secant latitude RMS
Gyrocompassing Alignment
2 minutes coarse
Gyrocompassing Alignment
10 minutes fine (typical)
Accuracy with Odometer (no GNSS) | A90
0.01 % distance travelled
Accuracy with Odometer (no GNSS) | A70
0.05 % distance travelled
Horizontal Position Accuracy (external RTK GNSS aided)
0.01 m
Vertical Position Accuracy (external RTK GNSS aided)
0.015 m
Velocity Accuracy (external GNSS aided)
0.005 m/s
Heave Accuracy
2 % or 0.02 m (whichever is greater)
Output Rate
1000 Hz



± 15 g
Bias Instability
7 ug
Initial Bias
< 100 ug
Initial Scaling Error
340 ppm
Scale Factor Stability | A90
100 ppm
Scale Factor Stability | A70
150 ppm
150 ppm
Cross-axis Alignment Error
< 0.001 °
Noise Density | A90
30 ug/√Hz
Noise Density | A70
40 ug/√Hz
Random Walk | A90
17 mm/s/√hr VRW
Random Walk | A70
23 mm/s/√hr VRW
300 Hz


± 490 °/s
Bias Instability (A90)
0.001 °/hr
Bias Instability (A70)
0.01 °/hr
Initial Bias (A90)
< 0.01 °/hr
Initial Bias (A70)
< 0.05 °/hr
Initial Scaling Error (A90)
80 ppm
Initial Scaling Error (A70)
100 ppm
Scale Factor Stability (A90)
10 ppm
Scale Factor Stability (A70)
20 ppm
10 ppm
Cross-axis Alignment Error
< 0.001 °
Noise Density (A90)
0.06 °/hr/√Hz
Noise Density (A70)
0.3 °/hr/√Hz
Random Walk (A90)
0.001 °/√h ARW
Random Walk (A70)
0.005 °/√h ARW
400 Hz


10 to 130 kPa
Bias Instability
8 Pa
Initial Bias
< 50 Pa
Noise Density
0.4 Pa/√Hz
50 Hz


Ethernet • RS232/RS422 • CAN • 1PPS
100Mbit • 4800 to 4M baud serial
AN Packet Protocol • NMEA • CANopen
Peripheral Interface
2x GPIO • 1x Auxiliary RS232
GPIO Level
5 V (RS232) • 3.3 V
GPIO Functions
1PPS input/output • Odometer input • DVL/USBL input • Air Data input • Zero Velocity input • NMEA input/output • Novatel GNSS input • Trimble GNSS input • AN Packet Protocol • CAN/CANopen


Operating Voltage
9 to 36 V
Input Protection
-200 to 200 V
Power Consumption (Typical)
12 W
Hot Start Battery Capacity
> 48 hrs
Hot Start Battery Charge Time
30 mins
Hot Start Battery Endurance
> 10 years
Operating Temperature
-40 °C to 75 °C
Environmental Protection
IP67 • MIL-STD-810H
> 70,000 hrs
Shock Limit
50 g 11 ms
8g rms (20-2000 Hz random)
160 x 140 x 115.5 mm
2.7 kg


Datasheet A90
06 Nov 2023 - V1.0
Datasheet A70
06 Nov 2023 - V1.0
Reference Manual A70 & A90 (Online)
Reference Manual A70 & A90 (PDF)
19 Apr 2024 - V1.2
3D Model
11 July 2023 - V1.0


Boreas Manager

Boreas Manager is used for testing, configuration, firmware management and logging with Boreas. Java 11 is required to run Boreas Manager v7.0 and later. Adoptium JRE 11 is the recommended Java installer. Please see the reference manual for more information.

11 Apr 2024 – v7.3

Boreas A70 Firmware

Firmware for all Boreas A70 hardware versions. This can be loaded onto Boreas using the web interface or the Boreas Manager software. The change log can be found in the Boreas reference manual.

3 Apr 2024 – v1.81

Boreas A90 Firmware

Firmware for all Boreas A90 hardware versions. This can be loaded onto Boreas using the web interface or the Boreas Manager software. The change log can be found in the Boreas reference manual.

3 Apr 2024 – v1.81

Boreas SDK

The Boreas SDK provides example source code for interfacing with Boreas through the AN Packet Protocol. The languages provided are C/C++, Java, and .Net C#.

15 Feb 2023 – v7.1

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